Inactivated 8 January 1942 at Fort Benning, Georgia, and relieved
from assignment to the 2d Armored Division

Assigned 15 February 1942 to the 6th Armored Division and
activated at Fort Knox, Kentucky

Regiment broken up 20 September 1943 and its elements reorganized
and redesignated as follows:

Regimental Headquarters and Headquarters Company and 2d Battalion
as the 68th Tank Battalion and remained assigned to the 6th Armored Division
1st Battalion as the 773d Tank Battalion and relieved from assignment to the
6th Armored Division
3d Battalion as the 15th Tank Battalion and remained assigned to the 6th Armored
Division
Reconnaissance Company as Troop D, 86th Cavalry Reconnaissance Squadron, Mechanized,
and remained an element of the 6th Armored Division
Maintenance and Service Companies, and Band disbanded